def test_get_recommendations_based_on_tracks__groups_recommendations_with_same_percentage(
self):
mock_track1 = mock_track(spotify_id="mock-track-id-1")
mock_track10 = mock_track(spotify_id="mock-track-id-10")
mock_track2 = mock_track(spotify_id="mock-track-id-2")
tracks = [mock_track1, mock_track10, mock_track2]
song_attribute_ranges = mock_song_attribute_ranges()
mock_recommendations = dict()
mock_recommendations[mock_track1] = 1.0
mock_recommendations[mock_track10] = 0.5
mock_recommendations[mock_track2] = 0.5
self.music_util._get_recommendations_based_on_tracks_in_batches = MagicMock(
return_value=mock_recommendations)
recommendations_by_percent = self.music_util.get_recommendations_based_on_tracks(
tracks, song_attribute_ranges)
self.assertEqual(2, len(recommendations_by_percent))
self.assertIn(1.0, recommendations_by_percent)
self.assertIn(0.5, recommendations_by_percent)
self.assertEqual(1, len(recommendations_by_percent[1.0]))
self.assertIn(mock_track1, recommendations_by_percent[1.0])
self.assertEqual(2, len(recommendations_by_percent[0.5]))
self.assertIn(mock_track10, recommendations_by_percent[0.5])
self.assertIn(mock_track2, recommendations_by_percent[0.5])
def test_populate_popularity_if_absent__no_popularity__populates(self):
tracks_without_popularity = [mock_track(popularity=None)]
track_with_popularity = [mock_track(popularity=1)]
self.mock_spotify.get_tracks = MagicMock(
return_value=track_with_popularity)
self.music_util.populate_popularity_if_absent(
tracks_without_popularity)
self.assertIsNotNone(tracks_without_popularity[0].popularity)
self.assertEqual(1, tracks_without_popularity[0].popularity)
def test_filter_out_if_not_in_albums__some_tracks_in_albums__filter_out_others(
self):
mock_tracks = [
mock_track(album=mock_album(spotify_id="album123")),
mock_track(album=mock_album(spotify_id="some other album")),
]
mock_albums = [mock_album(spotify_id="album123")]
tracks = self.music_util.filter_out_if_not_in_albums(
mock_tracks, mock_albums)
self.assertEqual(len(tracks), 1)
self.assertEqual(tracks[0].spotify_album_id, "album123")
def test_get_audio_feature_representative_range__tracks_with_same_value(
self):
audio_features_1 = mock_audio_features(danceability=0.75)
audio_features_2 = mock_audio_features(danceability=0.75)
playlist = mock_playlist(tracks=[
mock_track(audio_features=audio_features_1),
mock_track(audio_features=audio_features_2),
])
audio_feature_range = self.playlist_stats.get_audio_feature_representative_range(
playlist)
self.assertEqual(0.75, audio_feature_range[0].danceability)
self.assertEqual(0.75, audio_feature_range[1].danceability)
def test_get_audio_feature_representative_range__multiple_tracks__matches_range(
self):
audio_features_1 = mock_audio_features(danceability=0.95)
audio_features_2 = mock_audio_features(danceability=0.05)
playlist = mock_playlist(tracks=[
mock_track(audio_features=audio_features_1),
mock_track(audio_features=audio_features_2),
])
audio_feature_range = self.playlist_stats.get_audio_feature_representative_range(
playlist)
self.assertLessEqual(0, audio_feature_range[0].danceability)
self.assertGreaterEqual(1, audio_feature_range[1].danceability)
def test__get_recommendations_based_on_tracks_in_batches__recommended_for_half_the_tracks__specifies_50_percent(
self):
track_ids = ["mock-seed-track-1", "mock-seed-track-2"]
song_attribute_ranges = mock_song_attribute_ranges()
self.mock_spotify.get_recommendation_seed_limit = MagicMock(
return_value=1)
recommended_track = mock_track(spotify_id="mock-recommendation")
def mock_get_recommendations(track_ids, _):
if track_ids == ["mock-seed-track-1"]:
return [recommended_track]
elif track_ids == ["mock-seed-track-2"]:
return []
raise NotImplemented()
self.mock_spotify.get_recommendations_based_on_tracks = MagicMock(
side_effect=mock_get_recommendations)
recommendations_with_percentage = self.music_util._get_recommendations_based_on_tracks_in_batches(
track_ids, song_attribute_ranges)
self.assertEqual(1, len(recommendations_with_percentage))
self.assertIn(recommended_track, recommendations_with_percentage)
self.assertEqual(0.5,
recommendations_with_percentage[recommended_track])
def test_populate_popularity_if_absent__already_contains_popularity__no_change(
self):
input_tracks = [
mock_track(spotify_id="popularity is 2", popularity=2),
mock_track(spotify_id="popularity is 1", popularity=1)
]
self.mock_spotify.get_tracks = MagicMock(return_value=[])
self.music_util.populate_popularity_if_absent(input_tracks)
self.assertIsNotNone(input_tracks[0].popularity)
self.assertEqual(2, len(input_tracks))
self.assertEqual(2, input_tracks[0].popularity)
self.assertEqual("popularity is 2", input_tracks[0].spotify_id)
self.assertEqual(1, input_tracks[1].popularity)
self.assertEqual("popularity is 1", input_tracks[1].spotify_id)
def test_populate_track_audio_features(self):
track = mock_track(spotify_id="1ZZMu5cxiU4eFUNVwMnCJq",
audio_features=None)
self.spotify.set_track_audio_features([track])
self.assertIsNotNone(track.audio_features)
def test_filter_out_if_not_in_albums__no_albums__none_returned(self):
mock_tracks = [mock_track()]
mock_albums = []
tracks = self.music_util.filter_out_if_not_in_albums(
mock_tracks, mock_albums)
self.assertEqual(len(tracks), 0)
def test_filter_out_if_not_in_albums__all_tracks_in_albums__does_not_filter_any(
self):
mock_tracks = [mock_track(album=mock_album(spotify_id="album123"))]
mock_albums = [mock_album(spotify_id="album123")]
tracks = self.music_util.filter_out_if_not_in_albums(
mock_tracks, mock_albums)
self.assertEqual(tracks, mock_tracks)
def test_populate_popularity_if_absent__some_no_popularity__only_fetches_data_for_those(
self):
track_with_popularity_missing = mock_track(
spotify_id="popularity=None", popularity=None)
track_with_popularity_missing_2 = mock_track(
spotify_id="popularity=None #2", popularity=None)
input_tracks = [
track_with_popularity_missing,
mock_track(spotify_id="popularity is set", popularity=1),
track_with_popularity_missing_2,
]
self.mock_spotify.get_tracks = MagicMock(return_value=[])
self.music_util.populate_popularity_if_absent(input_tracks)
self.mock_spotify.get_tracks.assert_called_once()
self.mock_spotify.get_tracks.assert_called_once_with(
[track_with_popularity_missing, track_with_popularity_missing_2])
def test_get_artist_ids(self):
artist = mock_artist(spotify_id="mock-id-123")
mock_artists = [artist]
mock_tracks = [mock_track(artists=mock_artists)]
self.mock_spotify.get_playlist = MagicMock(return_value=mock_playlist(
tracks=mock_tracks))
artists = self.music_util.get_artists("mock_playlist_id")
self.assertEqual([artist], artists)
def test_get_audio_feature_representative_range__single_track__allows_full_range(
self):
audio_features = mock_audio_features(danceability=0.75)
playlist = mock_playlist(
tracks=[mock_track(audio_features=audio_features)])
audio_feature_range = self.playlist_stats.get_audio_feature_representative_range(
playlist)
self.assertEqual(0, audio_feature_range[0].danceability)
self.assertEqual(1, audio_feature_range[1].danceability)
def test_populate_popularity_if_absent__some_no_popularity__populates(
self):
track_with_popularity_missing = mock_track(
spotify_id="popularity=None", popularity=None)
input_tracks = [
track_with_popularity_missing,
mock_track(spotify_id="popularity is set", popularity=1)
]
track_with_popularity__after_fetched = [
mock_track(spotify_id="popularity=None", popularity=2),
]
self.mock_spotify.get_tracks = MagicMock(
return_value=track_with_popularity__after_fetched)
self.music_util.populate_popularity_if_absent(input_tracks)
self.assertIsNotNone(input_tracks[0].popularity)
self.assertEqual(2, len(input_tracks))
self.assertEqual(2, input_tracks[0].popularity)
self.assertEqual("popularity=None", input_tracks[0].spotify_id)
self.assertEqual(1, input_tracks[1].popularity)
self.assertEqual("popularity is set", input_tracks[1].spotify_id)
def test__get_recommendations_based_on_tracks_in_batches__multiple_percentages__recommends_all(
self):
track_ids = [
"mock-seed-track-1", "mock-seed-track-2", "mock-seed-track-3"
]
song_attribute_ranges = mock_song_attribute_ranges()
self.mock_spotify.get_recommendation_seed_limit = MagicMock(
return_value=1)
recommended_track1 = mock_track(spotify_id="mock-recommendation-1")
recommended_track2 = mock_track(spotify_id="mock-recommendation-2")
def mock_get_recommendations(track_ids, _):
if track_ids == ["mock-seed-track-1"]:
return [recommended_track1, recommended_track2]
elif track_ids == ["mock-seed-track-2"]:
return [recommended_track1]
elif track_ids == ["mock-seed-track-3"]:
return []
raise NotImplemented()
self.mock_spotify.get_recommendations_based_on_tracks = MagicMock(
side_effect=mock_get_recommendations)
recommendations_with_percentage = self.music_util._get_recommendations_based_on_tracks_in_batches(
track_ids, song_attribute_ranges)
self.mock_spotify.get_recommendations_based_on_tracks.assert_any_call(
["mock-seed-track-1"], song_attribute_ranges)
self.mock_spotify.get_recommendations_based_on_tracks.assert_any_call(
["mock-seed-track-2"], song_attribute_ranges)
self.mock_spotify.get_recommendations_based_on_tracks.assert_any_call(
["mock-seed-track-3"], song_attribute_ranges)
self.assertEqual(2, len(recommendations_with_percentage))
self.assertEqual(2.0 / 3.0,
recommendations_with_percentage[recommended_track1])
self.assertEqual(1.0 / 3.0,
recommendations_with_percentage[recommended_track2])
def test__get_recommendations_based_on_tracks_in_batches__recommended_for_all_tracks__specifies_100_percent(
self):
track_ids, song_attribute_ranges = ["mock-seed-track"
], mock_song_attribute_ranges()
self.mock_spotify.get_recommendation_seed_limit = MagicMock(
return_value=1)
recommended_track = mock_track(spotify_id="mock-recommendation")
self.mock_spotify.get_recommendations_based_on_tracks = MagicMock(
return_value=[recommended_track])
recommendations_with_percentage = self.music_util._get_recommendations_based_on_tracks_in_batches(
track_ids, song_attribute_ranges)
self.assertEqual(1, len(recommendations_with_percentage))
self.assertIn(recommended_track, recommendations_with_percentage)
self.assertEqual(1.0,
recommendations_with_percentage[recommended_track])